The aim of this paper is to describe metabolic and endocrine alterations in the male, partners of infertile couples. One hundred and six consecutive men were taken in order to analyze their serum ...samples. Each serum sample was analyzed by duplicate for luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol (E2), free-testosterone (T), 17 alpha-hydroxyprogesterone (17OHP), androstenedione (A), dehydroepiandrosterone-sulphate (DHEA-S), prolactin (PRL), insulin, glucose, total cholesterol and triclylcerides. The data analysis evidenced different metabolic or endocrine alterations in the group. A dysplipidemia incidence of 65% was found (isolated hypercholesterolemia, isolated triglyceridemia or both), where 80% of these patients were younger than 40 years. There was no correlation with obesity, overweight any endocrine alteration and the type of sperm alterations. There was a positive correlation between E2 and FSH (r = 0.67, p < 0.0001) in the group of 106 patients, which remained significant in the group of hyperestrogenic men (n = 27, r = 0.68, p < 0.0001), but not in men with normal serum estrogen levels (n = 79, r = 0.10, NS). Other alterations: obesity in 18%, overweight in 30.2%, diabetes mellitus 4.7%, glucose intolerance 15%, hypertension 26% (14/53), hypergonadotropic hypogonadism 3.8% (one of them with an Emty Sella syndrome). Unexpectedly only nine patients (8.4%) out of the 106 consecutive patients recluted did not have any of the metabolic or endodrine abnormalities here described. These are more significant since 83% of the patients are younger than 40 years. The most interesting non previously described finding was the positive correlation observed between E2 and FSH when estradiol levels exceeds 50 pg/mL.
Se realizó una revisión de los ejemplares de la Colección de Mamíferos Marinos del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". La misma indicó que del total de ejemplares ...catalogados (n=378), el 56.9% corresponde a Cetacea mientras que el 43.1% restante corresponde a Pinnipedia. Dentro de Cetacea la familia más representada es Delphinidae y el género con más ejemplares, Pontoporia (Pontoporidae); se reportan además, en forma complementaria, tres ejemplares tipo que no fueron listados en un trabajo previo. Dentro de los Pinnipedia, la familia mejor representada es Otariidae y el género con mayor número de ejemplares, Otaria.
A thorough revision of the specimens housed at the Marine Mammals collection of the Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" indicated that 56.9% (n=378), of the total number of specimens catalogued, belongs to Cetacea and the remainder (43.1%) to Pinnipedia. Among Cetacea, Delphinidae is the best represented family, whereas Pontoporia (Pontoporidae) is the genus which comprises the major number of specimens. Furthermore, we report three type specimens which were not cited in a previous work. As regards to Pinnipedia, the best represented family corresponds to Otariidae, being Otaria the genus with the highest number of specimens.
A colorimetric instrument for the noninvasive quantification of hemoglobin, designed using color shades resembling those observed in the conjunctiva, was tested. The instrument's colors are ...contrasted against the color of the conjunctiva to measure hemoglobin content. Sensitivity, specificity, negative predictive value, and false-negative value were estimated to test the instrument's accuracy; kappa coefficients were used to estimate inter- and intraobserver variability. Physician field evaluations of conjunctiva color for the screening of anemia, reported in the literature, have had sensitivities and specificities as high as 70%. Readings with the instrument demonstrated a 63% sensitivity, 72% specificity, and 38% false negatives for screening hemoglobin values of less than or equal to 13 g/dl. The interobserver kappa coefficients for three pairs of readers were good to excellent for the same hemoglobin screening value. Statistically significant differences were noted, however, between observers during the reliability test. The instrument can be used by unskilled personnel to improve their decision-making about whom to send for further care or for supplementation with iron.
Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of ...hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion (\(\pi N\)) TDAs from \(\bar{p}p \to e^+e^- \pi^0\) reaction with the future \={P}ANDA detector at the FAIR facility. At high center of mass energy and high invariant mass squared of the lepton pair \(q^2\), the amplitude of the signal channel \(\bar{p}p \to e^+e^- \pi^0\) admits a QCD factorized description in terms of \(\pi N\) TDAs and nucleon Distribution Amplitudes (DAs) in the forward and backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuring \(\bar{p}p \to e^+e^- \pi^0\) with the \={P}ANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. \(\bar{p}p \to \pi^+\pi^- \pi^0\) were performed for the center of mass energy squared \(s = 5\) GeV\(^2\) and \(s = 10\) GeV\(^2\), in the kinematic regions \(3.0 < q^2 < 4.3\) GeV\(^2\) and \(5 < q^2 < 9\) GeV\(^2\), respectively, with a neutral pion scattered in the forward or backward cone \(| \cos\theta_{\pi^0}| > 0.5 \) in the proton-antiproton center of mass frame. Results of the simulation show that the particle identification capabilities of the \={P}ANDA detector will allow to achieve a background rejection factor of \(5\cdot 10^7\) (\(1\cdot 10^7\)) at low (high) \(q^2\) for \(s=5\) GeV\(^2\), and of \(1\cdot 10^8\) (\(6\cdot 10^6\)) at low (high) \(q^2\) for \(s=10\) GeV\(^2\), while keeping the signal reconstruction efficiency at around \(40\%\). At both energies, a clean lepton signal can be reconstructed with the expected statistics corresponding to \(2\) fb\(^{-1}\) of integrated luminosity. (.../...)
We study the annihilation channel in proton antiproton collisions with production of a single neutral pion and an electron-positron pair. It is shown that this reaction allows access to the proton ...electromagnetic form factors in the ‘unphysical’ region and to the difference between complex phases of the Dirac and Pauli proton form factors. The differential cross section is given in the laboratory frame in an experimental setup where all outgoing particles are fully detected.
Phys. Rev. D 95, 032003 (2017) The exclusive charmonium production process in $\bar{p}p$ annihilation with
an associated $\pi^0$ meson $\bar{p}p\to J/\psi\pi^0$ is studied in the
framework of QCD ...collinear factorization. The feasibility of measuring this
reaction through the $J/\psi\to e^+e^-$ decay channel with the PANDA
(AntiProton ANnihilation at DArmstadt) experiment is investigated. Simulations
on signal reconstruction efficiency as well as the background rejection from
various sources including the $\bar{p}p\to\pi^+\pi^-\pi^0$ and $\bar{p}p\to
J/\psi\pi^0\pi^0$ reactions are performed with PandaRoot, the simulation and
analysis software framework of the PANDA experiment. It is shown that the
measurement can be done at PANDA with significant constraining power under the
assumption of an integrated luminosity attainable in four to five months of
data taking at the maximum design luminosity.
Simulation results for future measurements of electromagnetic proton form factors at \PANDA (FAIR) within the PandaRoot software framework are reported. The statistical precision with which the ...proton form factors can be determined is estimated. The signal channel \(\bar p p \to e^+ e^-\) is studied on the basis of two different but consistent procedures. The suppression of the main background channel, \(\textit{i.e.}\) \(\bar p p \to \pi^+ \pi^-\), is studied. Furthermore, the background versus signal efficiency, statistical and systematical uncertainties on the extracted proton form factors are evaluated using two different procedures. The results are consistent with those of a previous simulation study using an older, simplified framework. However, a slightly better precision is achieved in the PandaRoot study in a large range of momentum transfer, assuming the nominal beam conditions and detector performance.
